Operating state circuit for inverter and method for setting operating states of an inverter
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-001/00
H02P-001/28
H02P-003/00
H02P-007/06
H02P-007/14
H02P-023/00
H02P-025/00
H02P-027/00
H02P-027/06
B60L-003/00
H02H-007/08
H02P-006/182
H02P-029/024
H02M-001/32
H02P-003/22
출원번호
US-0239428
(2012-06-12)
등록번호
US-9673744
(2017-06-06)
우선권정보
DE-10 2011 081 173 (2011-08-18)
국제출원번호
PCT/EP2012/061093
(2012-06-12)
§371/§102 date
20140218
(20140218)
국제공개번호
WO2013/023807
(2013-02-21)
발명자
/ 주소
Eberlein, Edwin
Schoenknecht, Andreas
Raichle, Daniel
출원인 / 주소
Robert Bosch GmbH
대리인 / 주소
Michael Best & Friedrich LLP
인용정보
피인용 횟수 :
1인용 특허 :
4
초록▼
The invention relates to an operating state circuit for actuating an inverter (3), which supplies an n-phase electrical machine (5) with an n-phase supply voltage via phase connections (4a, 4b, 4c), wherein n≧1, comprising an evaluation device (6) which is connected to the phase connections (4a, 4b,
The invention relates to an operating state circuit for actuating an inverter (3), which supplies an n-phase electrical machine (5) with an n-phase supply voltage via phase connections (4a, 4b, 4c), wherein n≧1, comprising an evaluation device (6) which is connected to the phase connections (4a, 4b, 4c) of the inverter (3) and which is configured to detect output voltages of the inverter (3) to the phase connections (4a, 4b, 4c) and to determine a speed of the electrical machine (5) on the basis of the detected output voltages, and an actuating device (7) which is coupled to the evaluation device (6) and which is configured to switch to an idle state or an active short-circuit in dependence on the determined speed of the inverter (3).
대표청구항▼
1. An operating state circuit for driving an inverter, which supplies an n-phase supply voltage to an n-phase electric machine via a plurality of phase connections, where n≧2, the circuit comprising: an evaluation device connected to the inverter, wherein each of the plurality of phase connections a
1. An operating state circuit for driving an inverter, which supplies an n-phase supply voltage to an n-phase electric machine via a plurality of phase connections, where n≧2, the circuit comprising: an evaluation device connected to the inverter, wherein each of the plurality of phase connections are connected to the output voltages of the inverter and the evaluation device is configured to detect output voltages of the inverter at each of the plurality of phase connections and to determine a speed of the electric machine on the basis of the detected output voltages;a low-voltage energy supply device connected to the evaluation device, the low-voltage energy supply device configured to supply electrical energy to the evaluation device;a drive device coupled to the evaluation device and drives switching devices of the inverter to switch into at least one of the group including a freewheeling state and an active short circuit, in dependence on the determined speed,wherein the drive device drives switching devices of the inverter into the freewheeling state when the determined speed is less than a predetermined speed threshold value and drives switching devices of the inverter into the active short circuit when the determined speed is greater than or equal to the predetermined speed threshold value; andan energy supply device, which is directly coupled to a DC voltage intermediate circuit, the evaluation device, and the drive device and which is designed to supply electrical energy from the DC voltage intermediate circuit to the evaluation device and the drive device only when the low-voltage energy supply device has failed or another fault state has occurred on the low-voltage side of the inverter. 2. The operating state circuit as claimed in claim 1, wherein the evaluation device is designed to detect the field emf of the electric machine. 3. The operating state circuit as claimed in claim 1, wherein the evaluation device comprises a microcontroller. 4. The operating state circuit as claimed in claim 1, wherein the driving of the switching devices is only implemented when a fault state of the electric machine is detected. 5. An inverter arrangement for supplying an n-phase supply voltage to an n-phase electric machine, where n≧2, the inverter arrangement comprising: a DC voltage intermediate circuit, to which a DC voltage is supplied from a high-voltage source;an inverter comprising a multiplicity of switching devices, which is connected to the DC voltage intermediate circuit and is designed to provide the n-phase supply voltage at a plurality of phase connections;an operating state circuit for driving the inverter, the operating state circuit including an evaluation device connected to the inverter, wherein each of the plurality of phase connections are connected to the output voltages of the inverter and the evaluation device is configured to detect output voltages of the inverter at each of the plurality of phase connections and determine a speed of the electric machine on the basis of the detected output voltages,a drive device coupled to the evaluation device and drives switching devices of the inverter to switch into at least one of the group including a freewheeling state and an active short circuit, in dependence on the determined speed, anda low-voltage energy supply device connected to the evaluation device, the low-voltage energy supply device configured to supply electrical energy to the evaluation device,wherein the drive device drives switching devices of the inverter into the freewheeling state when the determined speed is less than a predetermined speed threshold value and drives switching devices of the inverter into the active short circuit when the determined speed is greater than or equal to the predetermined speed threshold value; andan energy supply device, which is directly coupled to the DC voltage intermediate circuit, the evaluation device, and the drive device and which is designed to supply electrical energy from the DC voltage intermediate circuit to the evaluation device and the drive device only when the low-voltage energy supply device has failed or another fault state has occurred on the low-voltage side of the inverter. 6. The inverter arrangement as claimed in claim 5, wherein the drive device is designed to switch the switching devices of the inverter into a freewheeling mode for a predetermined time period when the DC voltage in the DC voltage intermediate circuit falls below an intermediate circuit threshold value. 7. A method for setting operating states of an inverter, which supplies an n-phase supply voltage to an n-phase electric machine via a plurality of phase connections, where n≧2, the method comprising: supplying, with a low-voltage energy supply device, electrical energy to an evaluation device;providing, with an energy supply device, energy to a drive device and the evaluation device only when the low-voltage energy supply device has failed or another fault state has occurred on a low-voltage side of the inverter;detecting, with the evaluation device, output voltages at each of the plurality of phase connections of the inverter;determining, with the evaluation device, a speed of the electric machine on the basis of the detected output voltages;driving switching devices of the inverter for setting a freewheeling state when the determined speed is less than a predetermined speed threshold value; anddriving switching devices of the inverter for setting an active short circuit when the determined speed is greater than or equal to the predetermined speed threshold value,wherein the driving of the switching devices is only implemented when a fault state of the electric machine is detected. 8. The method as claimed in claim 7, further comprising the following steps: determining a DC voltage of a DC voltage intermediate circuit, which is connected to the input connections of the inverter; anddriving switching devices of the inverter for setting the freewheeling state for a predetermined time period when the determined DC voltage is below a predetermined intermediate circuit threshold value. 9. The method as claimed in claim 7, wherein the step of detecting the output voltages comprises detecting the field emf of the electric machine.
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이 특허에 인용된 특허 (4)
Atarashi Hirofumi,JPX, Control process in a motor driving control unit.
Welchko, Brian; Huse, Jonathan B.; Hiti, Silva; Conlon, Brendan M.; Stancu, Constantin C.; Rahman, Khwaja M.; Tang, David; Cawthorne, William R., Fault handling of inverter driven PM motor drives.
Welchko,Brian; Huse,Jonathan B; Hiti,Silva; Conlon,Brendan M.; Stancu,Constantin C.; Rahman,Khwaja M.; Tang,David; Cawthorne,William R., Fault handling of inverter driven PM motor drives.
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